气候变化领域集成服务门户(CCPortal): Resource Colimitation Drives Competition Between Phytoplankton and Bacteria in the Southern Ocean

CCPortal

DOI	10.1029/2020GL088369
	Resource Colimitation Drives Competition Between Phytoplankton and Bacteria in the Southern Ocean
	Ratnarajah L.; Blain S.; Boyd P.W.; Fourquez M.; Obernosterer I.; Tagliabue A.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:1
英文摘要	Across the Southern Ocean, phytoplankton growth is governed by iron and light, while bacterial growth is regulated by iron and labile dissolved organic carbon (LDOC). We use a mechanistic model to examine how competition for iron between phytoplankton and bacteria responds to changes in iron, light, and LDOC. Consistent with experimental evidence, increasing iron and light encourages phytoplankton dominance, while increasing LDOC and decreasing light favors bacterial dominance. Under elevated LDOC, bacteria can outcompete phytoplankton for iron, most easily under lower iron. Simulations reveal that bacteria are major iron consumers and suggest that luxury storage plays a key role in competitive iron uptake. Under seasonal conditions typical of the Southern Ocean, sources of LDOC besides phytoplankton exudation modulate the strength of competitive interactions. Continued investigations on the competitive fitness of bacteria in driving changes in primary production in iron-limited systems will be invaluable in refining these results. © 2020 The Authors.
英文关键词	Bacteria; Organic carbon; Phytoplankton; Bacterial growth; Competitive fitness; Competitive interactions; Dissolved organic carbon; Experimental evidence; Mechanistic modeling; Phytoplankton growth; Primary production; Iron; Bacteria (microorganisms)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169247
作者单位	Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; Sorbonne Université, CNRS, Laboratoire d'Océanographie Microbienne (LOMIC), Observatoire Océanologique de Banyuls, Banyuls sur mer, France; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; Aix Marseille Univ., Universite de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
推荐引用方式 GB/T 7714	Ratnarajah L.,Blain S.,Boyd P.W.,et al. Resource Colimitation Drives Competition Between Phytoplankton and Bacteria in the Southern Ocean[J],2021,48(1).
APA	Ratnarajah L.,Blain S.,Boyd P.W.,Fourquez M.,Obernosterer I.,&Tagliabue A..(2021).Resource Colimitation Drives Competition Between Phytoplankton and Bacteria in the Southern Ocean.Geophysical Research Letters,48(1).
MLA	Ratnarajah L.,et al."Resource Colimitation Drives Competition Between Phytoplankton and Bacteria in the Southern Ocean".Geophysical Research Letters 48.1(2021).